pygame不更新x和y

我嘗試添加一個跟隨紅色塊（玩家）的綠色塊（僵尸），但是玩家位置更新并且僵尸位置不會，我剛剛開始使用 python，我不明白為什么會發生，謝謝進步。

import pygame

pygame.init()
window = pygame.display.set_mode((300, 300))
clock = pygame.time.Clock()

player = pygame.Rect(0, 0, 20, 20)
player.center = window.get_rect().center
playerVel = 3

zombie = pygame.Rect(0, 0, 20, 20)
zombieVel = 2

run = True
while run:
    clock.tick(60)
    for event in pygame.event.get():
        if event.type == pygame.QUIT:
            run = False
        if event.type == pygame.KEYDOWN:
            print(pygame.key.name(event.key))

    keys = pygame.key.get_pressed()
    
    player.x  = (keys[pygame.K_RIGHT] - keys[pygame.K_LEFT]) * playerVel
    player.y  = (keys[pygame.K_DOWN] - keys[pygame.K_UP]) * playerVel
        
    player.centerx = player.centerx % window.get_width()
    player.centery = player.centery % window.get_height()

    if zombie.x > player.x:
      zombie.x =- zombieVel

    if zombie.x < player.x:
      zombie.x =  zombieVel

    if zombie.y > player.y:
      zombie.y =- zombieVel

    if zombie.y < player.y:
      zombie.y =  zombieVel

    window.fill(0)
    pygame.draw.rect(window, (255, 0, 0), player)
    pygame.draw.rect(window, (0, 255, 0), zombie)
    pygame.display.flip()


#https://stackoverflow.com/questions/16044229/how-to-get-keyboard-input-in-pygame

pygame.quit()
exit()

uj5u.com熱心網友回復：

if zombie.x > player.x:
      zombie.x =- zombieVel

    if zombie.x < player.x:
      zombie.x =  zombieVel

    if zombie.y > player.y:
      zombie.y =- zombieVel

    if zombie.y < player.y:
      zombie.y =  zombieVel

運營商應該是 =而-=不是= =-我認為

uj5u.com熱心網友回復：

我發現了問題：

您只是在添加 Zombie 速度時出錯

這是運行良好的更新代碼

import pygame

pygame.init()
window = pygame.display.set_mode((300, 300))
clock = pygame.time.Clock()

player = pygame.Rect(0, 0, 20, 20)
player.center = window.get_rect().center
playerVel = 3

zombie = pygame.Rect(0, 0, 20, 20)
zombieVel = 2

run = True
while run:
    clock.tick(60)
    for event in pygame.event.get():
        if event.type == pygame.QUIT:
            run = False
        if event.type == pygame.KEYDOWN:
            print(pygame.key.name(event.key))

    keys = pygame.key.get_pressed()

    player.x  = (keys[pygame.K_RIGHT] - keys[pygame.K_LEFT]) * playerVel
    player.y  = (keys[pygame.K_DOWN] - keys[pygame.K_UP]) * playerVel

    player.centerx = player.centerx % window.get_width()
    player.centery = player.centery % window.get_height()
    # changed those lines
    #################################################
    if zombie.x > player.x: zombie.x -= zombieVel 

    else: zombie.x  = zombieVel

    if zombie.y > player.y: zombie.y -= zombieVel

    else: zombie.y  = zombieVel
    #################################################    

    print(zombie.x, zombie.y)
    window.fill(0)
    pygame.draw.rect(window, (255, 0, 0), player)
    pygame.draw.rect(window, (0, 255, 0), zombie)
    pygame.display.flip()


# https://stackoverflow.com/questions/16044229/how-to-get-keyboard-input-in-pygame

pygame.quit()
exit()

提示如果你想給一個變數添加一個值，你可以這樣做， var = 1這是var = var 1.

您的代碼的問題是您將加號或減號放在等號后面，而不是前面。就是這樣一個簡單的錯誤。此錯誤導致您的zombie.x 的計算方式如下：zombie.x = 0 zombieVel 同樣適用于 y 值

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